Anyone know how to bias output tubes (using built in meter) on a Stereo Knight M-40 (Int. Amp)?

Maybe if you post a picture somewhere the amp could be identified 

Best of Luck


Peter

Thanks Peter, good idea.  Here's a url with photo's and detailed description - except how to bias.
http://www.stereoknight.com/S-40.html

Sounds like the meter acts as test point.Disregard RCA's for now.They shouldn't have anything to do with biasing.Try setting switch to #1,then slowly turn tweak(your word)next to tubes & see if meter changes.NOTE setting before moving tweak so it can go back.Pics in your link don't work.Maybe you could post pics in a virtual system so we can see it.

Thanks freediver. FYI - I'm a bit of an idiot, the amp is an S-40, not an M-40, sorry for any confusion.  I've set the switch to each number (1-4), with the amp on (its an integrated), with no inputs, and volume set to 0, the meter always reads 0. I also tried turning the pots (tweaks) next to each tube, but the meter doesn't move.  I'm thinking the RCAs are used to "insert" the meter's  "other lead", with the 1-4 switch being one, and the RCA's being the other.  If it's a true current reading, it'll need to be in series with the cathode, somehow they have to "break and insert" the meter in series. Perhaps the switch is set to 1 and RCA #1 is shorted?

Ok,Google turned up just enough info.I believe the 4 RCA's are so the passive preamp section can be isolated from the amp should you choose to use a different one.I think the problem is you must have a load on the amp to Bias.The single slot adjustment screws next to each power tube & the 1-4 switch should work together.First thing I would do is hook everything up & see if you get any sound.If your getting sound & the meter doesn't register it may be broken.Once you've confirmed the amp does work try the switch & bias pots,see what happens.Beautiful amp by the way.Good luck.